Improvement in hot-air furnaces



Vsmoke-dues into drum.

HENRY RANDALL, OF QUINCY, ILLINOIS.`

IMPROVEMENT IN HOT-AIR FURNACES.

Specification forming part of Letters Patent No. 117,814, dated August 8, 1871.

To all whom it may concern:

Beit known that I, HENRY RANDALL, of Quincy, in the county of Adams and State of Illinois, have invented a new and useful Improvement in Heating-Furnaces, of which the following is a speeiiication: Y

My invention relates to the construction of a fire-place, being formed, as shown, in a cylinder, with bars and a pit below it. From the furnace the iiame and smoke will follow the course of the arrows down iiues between the iire-box and the body of the furnace, and into opening at rear of furnace up iiue shaft into side flue-pipes; thence to heating-drum immediately over body of furnace, which will have the effect of causing the whole body of the furnace, fine-pipes, and drum to become a heating-surface, the whole being inclosed in a case, either brick or in portable forni.

No. l is a perspective view of my invention. No. 2 is a rear elevation of my heating-furnace, showing' the construction of the smoke-shaft and No. 3 is a rear section of my heating-furnace, showing portion of the interior.

A is the fire-place to heat my furnace. B is the ease inclosing my nre-place, which is heated by the iiame and smoke following the course of the arrows down flues 1 and through aperture 2 into shaft 3, and continued from there through due-pipes 4 and 4 into drum 5, thus making the whole surface a radiating heater. C is the smokepipe to carry smoke from drum into a chimney provided for that purpose. D is a door to clean out bottom of shaft, 85e. Eis the ash-pit door to let air in and take ont ashes. F is a door to olea-11 out accumulated dust and ashes between fire-box and body of furnace.

I claim as my invention- The arrangement of the flue-pipes 4, in combination with the construction of ilues 1 in the body of the furnace and the opening 2 in rear of furnace, with rear shaft 3, side iiues e1 and drum 5, as a combination to generate heat, substantially as and for the purposes hereinbefore set forth.

HENRY RANDALL. Vitnesses:

L. E. EMMoNs, J oHN HU'rroN.

FICE. 

